The Montana-Yellowstone Geologic Field Guide Database
A collection of geologic field guides and road logs in Montana and Yellowstone. Search the database by entering a keyword or choosing one of the listed terms for geologic topic, geographic location, or geologic province.

The Digital Library for Earth System Education
A
"distributed community effort involving educators, students, and scientists working together to improve the quality, quantity, and efficiency of teaching and learning about the Earth system at all levels."

National Science Digital Library
"Created by the National Science Foundation to provide organized access to high quality resources and tools that support innovations in teaching and learning at all levels of science, technology, engineering, and mathematics education."